Delta G






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MaryBanh_2K
Posts: 101
Joined: Wed Sep 18, 2019 12:21 am

Delta G

Postby MaryBanh_2K » Fri Feb 14, 2020 12:39 am

Why do we solve for delta G of the reaction using the delta G with the degree sign? I know that the degree sign indicates that the reaction is at standard temperature and pressure but what is the significance of this?

Ariel Davydov 1C
Posts: 110
Joined: Thu Jul 11, 2019 12:16 am
Been upvoted: 1 time

Re: Delta G

Postby Ariel Davydov 1C » Fri Feb 14, 2020 7:55 am

The purpose of the degree sign is to indicate that the relationship between enthalpy, entropy, and temperature in regards to spontaneity is deltaG = deltaH -T*deltaS only at standard conditions.

Ritu Gaikwad 2E
Posts: 52
Joined: Thu Jul 11, 2019 12:16 am

Re: Delta G

Postby Ritu Gaikwad 2E » Fri Feb 14, 2020 10:06 am

The Delta G with the degree sign is the one being calculated because this is under standard conditions for the reaction and correlates to a standard enthalpy and entropy and is calculated that way.

Zoe Gleason 4F
Posts: 51
Joined: Tue Jul 23, 2019 12:15 am

Re: Delta G

Postby Zoe Gleason 4F » Fri Feb 14, 2020 10:16 am

It means that it is under standard conditions. In calculating ΔG, if you wanted to calculate the standard form, you would have to use other values that are also in their standard form.

Ruth Glauber 1C
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Joined: Wed Sep 18, 2019 12:20 am

Re: Delta G

Postby Ruth Glauber 1C » Sat Feb 15, 2020 7:17 am

The degree sign indicates standard form.

Lauren Tanaka 1A
Posts: 109
Joined: Sat Aug 17, 2019 12:18 am

Re: Delta G

Postby Lauren Tanaka 1A » Sat Feb 15, 2020 10:19 am

The naught sign means that the conditions are under STP or standard temperature and pressure. If the delta G has the naught symbol then so does the delta S and H.

Kristina Rizo 2K
Posts: 105
Joined: Wed Sep 18, 2019 12:19 am

Re: Delta G

Postby Kristina Rizo 2K » Sat Feb 15, 2020 11:34 am

Lauren Tanaka 1A wrote:The naught sign means that the conditions are under STP or standard temperature and pressure. If the delta G has the naught symbol then so does the delta S and H.

STP is 1 atm and 273.15K right ?


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